There are 4 Valmet L-90 aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top. The ones listed here were built between 1986 and 1992.
N275RX
1992 Valmet L-90
Las Vegas, NV
N762SH
1992 Valmet L-90
Las Vegas, NV
N90MF
1992 Valmet L-90
Las Vegas, NV
N702BA
1986 Valmet L-90
Las Vegas, NV